/*
* Copyright (c) 2011, Florian Zeitz <florob@babelmonkeys.de>
*
* https://webkeks.org/hg/objopenssl/
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <openssl/crypto.h>
#include <openssl/x509v3.h>
#import "X509Certificate.h"
#import <ObjFW/OFAutoreleasePool.h>
#import <ObjFW/OFArray.h>
#import <ObjFW/OFDataArray.h>
#import <ObjFW/OFDictionary.h>
#import <ObjFW/OFFile.h>
#import <ObjFW/OFInitializationFailedException.h>
#import <ObjFW/OFInvalidEncodingException.h>
#import <ObjFW/OFList.h>
#import <ObjFW/OFMutableDictionary.h>
#import <ObjFW/OFString.h>
@implementation X509Certificate
- initWithFile: (OFString*)file
{
self = [self init];
@try {
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFFile *fd = [OFFile fileWithPath: file
mode: @"r"];
OFDataArray *data = [fd readDataArrayTillEndOfStream];
[fd close];
const unsigned char *dataCArray = [data cArray];
crt = d2i_X509(NULL, &dataCArray, [data count]);
[pool release];
if (crt == NULL)
@throw [OFInitializationFailedException
exceptionWithClass: isa];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- initWithX509Struct: (X509*)cert
{
self = [self init];
@try {
crt = X509_dup(cert);
if (crt == NULL)
@throw [OFInitializationFailedException
exceptionWithClass: isa];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[issuer release];
[subject release];
[subjectAlternativeName release];
if (crt != NULL)
X509_free(crt);
[super dealloc];
}
- (OFString*)description
{
OFMutableString *ret = [OFMutableString string];
[ret appendFormat: @"Issuer: %@\n\n", [self issuer]];
[ret appendFormat: @"Subject: %@\n\n", [self subject]];
[ret appendFormat: @"SANs: %@", [self subjectAlternativeName]];
[ret makeImmutable];
return ret;
}
- (OFDictionary*)issuer
{
X509_NAME *name;
if (issuer != nil)
return [[issuer copy] autorelease];
name = X509_get_issuer_name(crt);
issuer = [[self X509_dictionaryFromX509Name: name] retain];
return issuer;
}
- (OFDictionary*)subject
{
X509_NAME *name;
if (subject != nil)
return [[subject copy] autorelease];
name = X509_get_subject_name(crt);
subject = [[self X509_dictionaryFromX509Name: name] retain];
return subject;
}
- (OFDictionary*)subjectAlternativeName
{
OFAutoreleasePool *pool;
OFMutableDictionary *ret;
int i;
if (subjectAlternativeName != nil)
return [[subjectAlternativeName copy] autorelease];
ret = [OFMutableDictionary dictionary];
pool = [[OFAutoreleasePool alloc] init];
i = -1;
while ((i = X509_get_ext_by_NID(crt, NID_subject_alt_name, i)) != -1) {
X509_EXTENSION *extension;
STACK_OF(GENERAL_NAME) *values;
int j, count;
if ((extension = X509_get_ext(crt, i)) == NULL)
break;
if ((values = X509V3_EXT_d2i(extension)) == NULL)
break;
count = sk_GENERAL_NAME_num(values);
for (j = 0; j < count; j++) {
GENERAL_NAME *generalName;
OFList *list;
generalName = sk_GENERAL_NAME_value(values, j);
switch(generalName->type) {
case GEN_OTHERNAME:;
OTHERNAME *otherName = generalName->d.otherName;
OFMutableDictionary *types;
X509OID *key;
types = [ret objectForKey: @"otherName"];
if (types == nil) {
types =
[OFMutableDictionary dictionary];
[ret setObject: types
forKey: @"otherName"];
}
key = [self X509_stringFromASN1Object:
otherName->type_id];
list = [types objectForKey: key];
if (list == nil) {
list = [OFList list];
[types setObject: list
forKey: key];
}
[list appendObject:
[self X509_stringFromASN1String:
otherName->value->value.asn1_string]];
break;
case GEN_EMAIL:
list = [ret objectForKey: @"rfc822Name"];
if (list == nil) {
list = [OFList list];
[ret setObject: list
forKey: @"rfc822Name"];
}
[list appendObject:
[self X509_stringFromASN1String:
generalName->d.rfc822Name]];
break;
case GEN_DNS:
list = [ret objectForKey: @"dNSName"];
if (list == nil) {
list = [OFList list];
[ret setObject: list
forKey: @"dNSName"];
}
[list appendObject:
[self X509_stringFromASN1String:
generalName->d.dNSName]];
break;
case GEN_URI:
list = [ret objectForKey:
@"uniformResourceIdentifier"];
if (list == nil) {
list = [OFList list];
[ret setObject: list
forKey: @"uniformResource"
@"Identifier"];
}
[list appendObject:
[self X509_stringFromASN1String:
generalName->d.uniformResourceIdentifier]];
break;
case GEN_IPADD:
list = [ret objectForKey: @"iPAddress"];
if (list == nil) {
list = [OFList list];
[ret setObject: list
forKey: @"iPAddress"];
}
[list appendObject: [self
X509_stringFromASN1String:
generalName->d.iPAddress]];
break;
default:
break;
}
}
i++; /* Next extension */
[pool releaseObjects];
}
[pool release];
[ret makeImmutable];
subjectAlternativeName = [ret retain];
return ret;
}
- (BOOL)hasCommonNameMatchingDomain: (OFString*)domain
{
OFString *name;
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFList *CNs = [[self subject] objectForKey: OID_commonName];
OFEnumerator *enumerator = [CNs objectEnumerator];
while ((name = [enumerator nextObject]) != nil) {
if ([self X509_isAssertedDomain: name
equalDomain: domain]) {
[pool release];
return YES;
}
}
[pool release];
return NO;
}
- (BOOL)hasDNSNameMatchingDomain: (OFString*)domain
{
OFString *name;
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFDictionary *SANs = [self subjectAlternativeName];
OFList *assertedNames = [SANs objectForKey: @"dNSName"];
OFEnumerator *enumerator = [assertedNames objectEnumerator];
while ((name = [enumerator nextObject]) != nil) {
if ([self X509_isAssertedDomain: name
equalDomain: domain]) {
[pool release];
return YES;
}
}
[pool release];
return NO;
}
- (BOOL)hasSRVNameMatchingDomain: (OFString*)domain
service: (OFString*)service
{
size_t serviceLength;
OFString *name;
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFDictionary *SANs = [self subjectAlternativeName];
OFList *assertedNames = [[SANs objectForKey: @"otherName"]
objectForKey: OID_SRVName];
OFEnumerator *enumerator = [assertedNames objectEnumerator];
if (![service hasPrefix: @"_"])
service = [service stringByPrependingString: @"_"];
service = [service stringByAppendingString: @"."];
serviceLength = [service length];
while ((name = [enumerator nextObject]) != nil) {
if ([name hasPrefix: service]) {
OFString *asserted;
asserted = [name substringWithRange: of_range(
serviceLength, [name length] - serviceLength)];
if ([self X509_isAssertedDomain: asserted
equalDomain: domain]) {
[pool release];
return YES;
}
}
}
[pool release];
return NO;
}
- (BOOL)X509_isAssertedDomain: (OFString*)asserted
equalDomain: (OFString*)domain
{
/*
* In accordance with RFC 6125 this only allows a wildcard as the
* left-most label and matches only the left-most label with it.
* E.g. *.example.com matches foo.example.com,
* but not foo.bar.example.com
*/
size_t firstDot;
if ([asserted caseInsensitiveCompare: domain] == OF_ORDERED_SAME)
return YES;
if (![asserted hasPrefix: @"*."])
return NO;
asserted = [asserted substringWithRange:
of_range(2, [asserted length] - 2)];
firstDot = [domain indexOfFirstOccurrenceOfString: @"."];
if (firstDot == OF_INVALID_INDEX)
return NO;
domain = [domain substringWithRange:
of_range(firstDot + 1, [domain length] - firstDot - 1)];
if (![asserted caseInsensitiveCompare: domain])
return YES;
return NO;
}
- (OFDictionary*)X509_dictionaryFromX509Name: (X509_NAME*)name
{
OFMutableDictionary *dict = [OFMutableDictionary dictionary];
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
int i, count = X509_NAME_entry_count(name);
for (i = 0; i < count; i++) {
X509OID *key;
OFString *value;
X509_NAME_ENTRY *entry = X509_NAME_get_entry(name, i);
ASN1_OBJECT *obj = X509_NAME_ENTRY_get_object(entry);
ASN1_STRING *str = X509_NAME_ENTRY_get_data(entry);
key = [self X509_stringFromASN1Object: obj];
if ([dict objectForKey: key] == nil)
[dict setObject: [OFList list]
forKey: key];
value = [self X509_stringFromASN1String: str];
[[dict objectForKey: key] appendObject: value];
[pool releaseObjects];
}
[pool release];
[dict makeImmutable];
return dict;
}
- (X509OID*)X509_stringFromASN1Object: (ASN1_OBJECT*)object
{
X509OID *ret;
int length, bufferLength = 256;
char *buffer = [self allocMemoryWithSize: bufferLength];
@try {
while ((length = OBJ_obj2txt(buffer, bufferLength, object,
1)) > bufferLength) {
bufferLength = length;
buffer = [self resizeMemory: buffer
toSize: bufferLength];
}
ret = [[[X509OID alloc]
initWithUTF8String: buffer] autorelease];
} @finally {
[self freeMemory: buffer];
}
return ret;
}
- (OFString*)X509_stringFromASN1String: (ASN1_STRING*)str
{
OFString *ret;
char *buffer;
if (ASN1_STRING_to_UTF8((unsigned char**)&buffer, str) < 0)
@throw [OFInvalidEncodingException exceptionWithClass: isa];
@try {
ret = [OFString stringWithUTF8String: buffer];
} @finally {
OPENSSL_free(buffer);
}
return ret;
}
@end
@implementation X509OID
- initWithUTF8String: (const char*) str
{
self = [self init];
@try {
string = [[OFString alloc] initWithUTF8String: str];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[string release];
[super dealloc];
}
- (OFString*)description
{
char tmp[1024];
OBJ_obj2txt(tmp, sizeof(tmp), OBJ_txt2obj([string UTF8String], 1), 0);
return [OFString stringWithUTF8String: tmp];
}
- (BOOL)isEqual: (id)object
{
if (([object isKindOfClass: [OFString class]]) ||
([object isKindOfClass: [X509OID class]]))
return [object isEqual: string];
return NO;
}
- (uint32_t)hash
{
return [string hash];
}
- copy
{
return [self retain];
}
@end